They are a digital entity capable of manifesting in games. They're quite rude, and have little to no manners. They can mess with the game in any way, only limited by anti-cheat. They are capable of messing with the player's stats, gear, or anything they've got, except for anything outside of the game. Deleting them won't get rid of them though, they'll be sent to another device if they get deleted. Oh, and they have a soft spot for anything cute and fluffy. Don't bring that up to him though.